On Thursday January 15, evan.felix@pnl.gov wrote: > I've been attempting to create a large raid 5 device using the linux > 2.6.1 kernel, with the Large Block Device configured on. I have in the > system 16 250G disks. I built an array with mdadm -C -n 15 -x 1 > /dev/md2 /dev/sd[a-p] > > The resync/recovery seemed to be going fine, but at some point i started > seeing: > > kernel: compute_blocknr: map not correct > kernel: compute_blocknr: map not correct ... > > Has anyone else made an array this large? and does anybody have any > pointers on where i can start looking at code to fix this? I would look in drivers/md/raid5.c and compute_blocknr() in that file. I would change "chunk_number" to a sector_t and change: chunk_number = stripe * data_disks + i; to read chunk_number = (sector_t)stripe * data_disks + i; Possibly "stripe" and "chunk_number" should both be "sector_t", but I'm not at all sure. Please let me know if it helps. NeilBrown - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
